Sanding sealer will make the paint stretch and crack “crazy” look after a short time as it don’t “seal” the wood the way people think, Sanding sealer only locks down the strands of the surface for a better surface sand prior to being oiled, sanding sealer as a surface sealer just doesn’t work at actually “sealing” as it’s penetration is pretty low especially with hardwoods, the crazy paint on a sanding sealed surface is due to the wood still being able to move.
This is a common fact so please don’t make the mistake!
For a wooden boat you should seal the wood with lacquer 2 coats at least( rub down between coats) then primer, etch filler or standard car primers work fine, colour then lacquer again for finish coat, lacquer can also be used as a varnish for the deck.
On all my wooden boats I use an epoxy varnish to seal and use as a finish coat but it’s not cheap £50 + other parts per 1L) and not for the faint hearted, ( requires a working term of 22 degrees and smells so bad and is very messy to clean up if u mess up) but lacquer works equally well but will require up to 12 coats to get the deck polished up perfectly.
As for paint once the surface is sealed and primed as instructed, you can use acrylic colours, airbrushes or rattle can once fully dry then lacquer to finish.
Do not use acrylic lacquer over a oil based paint colour like enamels it’s simply will crazy or orange peel, stick to car paints and you should be fine.
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